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TOTEM Papers

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2021-11-18
15:56
Characterisation of the dip-bump structure observed in proton–proton elastic scattering at $\sqrt{s}$ = 8 TeV / TOTEM Collaboration
The TOTEM collaboration at the CERN LHC has measured the differential cross-section of elastic proton-proton scattering at $\sqrt{s} = 8\ {\rm TeV}$ in the squared four-momentum transfer range $0.2\ {\rm GeV^{2}} < |t| < 1.9\ {\rm GeV^{2}}$. This interval includes the structure with a diffractive minimum ("dip") and a secondary maximum ("bump") that has also been observed at all other LHC energies, where measurements were made. [...]
arXiv:2111.11991; CERN-EP-2021-242.- 2022-03-26 - 6 p. - Published in : Eur. Phys. J. C 82 (2022) 263 Draft (restricted): PDF; Fulltext: document - PDF; 2111.11991 - PDF; CERN-EP-2021-242 - PDF;

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2021-10-12
17:40
First search for exclusive diphoton production at high mass with tagged protons in proton-proton collisions at $\sqrt{s} = $ 13 TeV / CMS Collaboration
A search for exclusive two-photon production via photon exchange in proton-proton collisions, ${\mathrm{p}}{\mathrm{p}}\to{\mathrm{p}}\gamma\gamma{\mathrm{p}}$ with intact protons, is presented. [...]
arXiv:2110.05916 ; CMS-EXO-18-014 ; TOTEM-2021-002 ; CERN-EP-2021-191 ; CMS-EXO-18-014-003 ; TOTEM-2021-002. - 2021. - 31 p.
Fermilab Library Server - Fulltext - Fulltext - Fulltext

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2020-11-26
13:26
Comparison of pp and pp ̄ differential elastic cross sections and observation of the exchange of a colorless C-odd gluonic compound / V.M.~Abazov, V.M. (-) ; Abbott, B. (-) ; Acharya, B. S. (-) ; Adams, M. (-) ; Adams, T. (-) ; Agnew, J. P. (-) ; Alexeev, G. D. (-) ; Alkhazov, G. (-) ; Alton, A. (-) ; Antchev, G. (-) et al.
We describe a quantitative analysis comparing the p anti-p elastic cross section as measured by the D0 Collaboration at a center-of-mass energy of 1.96 TeV to that in pp collisions as measured by the TOTEM Collaboration at 2.76, 7, 8, and 13 TeV using a mainly model-independent approach. The TOTEM cross sections extrapolated to a center-of-mass energy of sqrt(s) = 1.96 TeV are compared with the D0 measurement in the region of the diffractive minimum and the second maximum of the pp cross section. [...]
CERN-EP-2020-236; FERMILAB PUB-20-568-E.- Geneva : CERN, 2020 - 15. Draft (restricted): PDF; Fulltext: PDF;

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2020-02-27
20:48
Measurement of single-diffractive dijet production in proton-proton collisions at $\sqrt{s} =$ 8 TeV with the CMS and TOTEM experiments / CMS and TOTEM Collaborations
Measurements are presented of the single-diffractive dijet cross section and the diffractive cross section as a function of the proton fractional momentum loss $\xi$ and the four-momentum transfer squared $t$. Both processes ${\mathrm{p}}{\mathrm{p}} \to {\mathrm{p}}\mathrm{X}$ and ${\mathrm{p}}{\mathrm{p}} \to \mathrm{X}{\mathrm{p}}$, ie with the proton scattering to either side of the interaction point, are measured, where $\mathrm{X}$ includes at least two jets; the results of the two processes are averaged [...]
arXiv:2002.12146; CMS-FSQ-12-033; TOTEM-2020-001; CERN-EP-2019-260; CMS-FSQ-12-033-003.- Geneva : CERN, 2020-12-17 - 42 p. - Published in : Eur. Phys. J. C 80 (2020) 1164 Article from SCOAP3: PDF; Fulltext: PDF; External links: Additional information for the analysis; CMS AuthorList

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2018-12-14
09:19
Elastic differential cross-section ${\rm d}\sigma/{\rm d}t$ at $\sqrt{s}=$2.76 TeV and implications on the existence of a colourless 3-gluon bound state / TOTEM Collaboration
The proton-proton elastic differential cross section dσ /dt has been measured by the TOTEM exper- iment at √s = 2.76 TeV energy with Beta∗ = 11 m beam optics. The Roman Pots were inserted to 13 times the transverse beam size from the beam, which allowed to measure the differential cross- section of elastic scattering in a range of the squared four-momentum transfer (|t|) from 0.36 GeV2 to 0.74 GeV2. [...]
arXiv:1812.08610; CERN-EP-2018-341; TOTEM-2018-002.- Geneva : CERN, 2020-02-05 - 10 p. - Published in : Eur. Phys. J. C 80 (2020) 91 Article from SCOAP3: PDF; Draft (restricted): PDF; Fulltext: 1812.08610 - PDF; CERN-EP-2018-341 - PDF;

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2018-12-13
17:02
Elastic differential cross-section measurement at $\sqrt{s}=13$  TeV by TOTEM / TOTEM Collaboration
The TOTEM collaboration has measured the elastic proton-proton differential cross section dσ/dt at √s = 13 TeV LHC energy using dedicated beta∗ = 90 m beam optics. The Roman Pot detectors were inserted to 10σ distance from the LHC beam, which allowed the measurement of the range [0.04 GeV**2;4 GeV**2] in four-momentum transfer squared |t|. [...]
arXiv:1812.08283; CERN-EP-2018-338; TOTEM-2018-003.- Geneva : CERN, 2019-10-19 - 20 p. - Published in : Eur. Phys. J. C 79 (2019) 861 Draft (restricted): PDF; Fulltext: CERN-EP-2018-338 - PDF; 1812.08283 - PDF; Fulltext from Publisher: PDF; Fulltext from publisher: PDF;

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2018-10-23
07:44
Beam-Background Tests with TOTEM Roman Pot Detectors at the LHC Injection Energy / Kašpar, Jan (CERN ; Prague, Inst. Phys.) /TOTEM Collaboration
With the aim of measuring the total cross-section and the $\rho$ parameter, TOTEM has performed tests of beam conditions at the LHC injection energy of $\sqrt{s} = 900$ GeV. The tests have revealed complications in setting up the LHC collimators to minimise the background observed in the Roman Pot (RP) detectors, summarised in this article. [...]
2018 - 7 p. - Published in : Instruments 2 (2018) 20 Fulltext: PDF;

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2018-03-13
19:51
Observation of proton-tagged, central (semi)exclusive production of high-mass lepton pairs in pp collisions at 13 TeV with the CMS-TOTEM precision proton spectrometer / CMS and TOTEM Collaborations
The process pp$\to\ell^+\ell^-$p$^{(*)}$, with $\ell^+\ell^-$ a muon or an electron pair produced at midrapidity with mass larger than 110 GeV, has been observed for the first time at the LHC in pp collisions at $\sqrt{s} =$ 13 TeV. One of the two scattered protons is measured in the CMS-TOTEM precision proton spectrometer (CT-PPS), which operated for the first time in 2016. [...]
arXiv:1803.04496; CMS-PPS-17-001; TOTEM 2018-001; CERN-EP-2018-014; CMS-PPS-17-001-003.- Geneva : CERN, 2018-07-24 - 41 p. - Published in : JHEP 07 (2018) 153 Article from SCOAP3: PDF; Fulltext: PDF; External link: Figures, tables and other information

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2017-12-16
11:16
First determination of the ${\rho }$ parameter at ${\sqrt{s} = 13}$ TeV: probing the existence of a colourless C-odd three-gluon compound state / TOTEM Collaboration
The TOTEM experiment at the LHC has performed the first measurement at √s = 13 TeV of the ρ parameter, the real to imaginary ratio of the nuclear elastic scattering amplitude at t = 0, obtaining the following results: ρ = 0.09 ± 0.01 and ρ = 0.10 ± 0.01, depending on different physics assumptions and mathematical modelling. The unprecedented precision of the ρ measurement, combined with the TOTEM total cross-section measurements in an energy range larger than 10TeV (from 2.76 to 13TeV), has implied the exclusion of all the models classified and published by COMPETE. [...]
arXiv:1812.04732; CERN-EP-2017-335; CERN-EP-2017-335-v3.- Geneva : CERN, 2019-09-23 - 28 p. - Published in : Eur. Phys. J. C 79 (2019) 785 Article from SCOAP3: PDF; Draft (restricted): PDF; Fulltext: arXiv:1812.04732 - PDF; CERN-EP-2017-335 - PDF; External link: Gizmodo article

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2017-12-06
18:16
First measurement of elastic, inelastic and total cross-section at sqrt(s)= 13 TeV by TOTEM and overview of cross-section data at LHC energies / TOTEM Collaboration
The TOTEM collaboration has measured the proton-proton total cross section at $\sqrt{s}=13$ TeV with a luminosity-independent method. Using dedicated $\beta^{*}=90$ m beam optics, the Roman Pots were inserted very close to the beam. [...]
arXiv:1712.06153; CERN-EP-2017-321; CERN-EP-2017-321-V2.- Geneva : CERN, 2019-02-01 - 16 p. - Published in : Eur. Phys. J. C 79 (2019) 103 Article from SCOAP3: PDF; Draft (restricted): PDF; Fulltext: arXiv:1712.06153 - PDF; cross_section_measurement_at_13_TeV_CERN-EP-2017-321-02 - PDF; CERN-EP-2017-321 - PDF; Fulltext from Publisher: PDF;

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